"After a review over the last several days of Election Day proceedings, serious questions have been raised regarding the results," Mantello said in a statement Friday.

Mantello retained John Sweeney, the former congressman, to represent her in the court proceedings before state Supreme Court Justice Eugene Devine at 10:30 a.m. Tuesday in Albany.

Sweeney said some voters claim that they were told by election inspectors and county Board of Elections officials that they could not split their ballot among parties.

Voters could cast ballots for up to three of the seven candidates running for the three at-large seats on the council.

Sweeney also questioned the large amount of votes that Green Party at-large candidate Jessica Ashley received at the Election District 17 polling place at Kennedy Towers — an affordable senior citizen housing complex and traditional Democrat stronghold.

"She thinks it's important the every vote be counted," Sweeney said.

"I believe every vote was counted," Kopka said.

City Democratic Chair Jack McCann, who sat through the counting of absentee ballots, said he saw no problems with Board of Elections' procedures. If the results stand up, Mantello will have lost her second citywide election in two election cycles. She lost a mayoral race to Democrat Lou Rosamilia in 2011.